Comparing: Object 140 vs. Centurion Action X

An experimental medium tank. Developed between 1953 and 1958 in Nizhny Tagil to replace the T-54. Two prototypes were built, but in 1958 the project was terminated in favor of the Object 430.

The Action X turret was planned to be used for later variants of the Centurion tank. One prototype of the turret was mounted on the chassis of the Centurion Mark 7, and another was used for ballistic trials. The vehicles with the Action X turret never entered mass production or saw service.